java初学者，大家帮我看个小程序

，这里没改，而且你想实现的应该是，点击确定后，文本框的内容写入denglu.txt文件中，所以File file1 =new File("D:\\denglu.txt");及以后的代码应放在surelistener类里
所有的代码如下：
package test;

import java.awt.*;
import java.awt.event.*;
import *;

public class Test {
    TextField loginField = new TextField(10);
    TextField passworldField = new TextField(10);
    TextField homeField = new TextField(10);
    Button sure = new Button("确定");
    Button clear = new Button("清除");// 这些东西放在denglu()方法里面，有错，所以我拿出来了
    public static String loginT, passwordT, homeT;

    public void denglu() {
        Frame f = new Frame();
        f.setBounds(150, 150, 200, 200);
        f.setVisible(true);
        f.setLayout(new GridLayout(4, 2, 4, 4));

        Label log_in = new Label(" 用户名");
        Label password_ = new Label(" 密码 ");
        Label home_ = new Label(" 地址 ");

        sure.addActionListener(new sureListener());

        clear.addActionListener(new clearListener());

        f.add(log_in);
        f.add(loginField);
        f.add(password_);
        f.add(passworldField);
        f.add(home_);
        f.add(homeField);
        f.add(sure);
        f.add(clear);

        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent arg0) {
                System.exit(0);
            }
        });

    }

    class sureListener implements ActionListener {
        public void actionPerformed(ActionEvent e1) {
            if (e1.getSource() == sure) {

                loginT = loginField.getText();
                passwordT = passworldField.getText();
                homeT = homeField.getText();
               
                File file1 = new File("D:\\denglu.txt");
                try {
                    file1.createNewFile();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                try {
                    FileWriter fw = new FileWriter("D:\\denglu.txt");
                    fw.write(loginT);
                    fw.write(passwordT);
                    fw.write(homeT);
                    fw.flush();
                    fw.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    class clearListener implements ActionListener {
        public void actionPerformed(ActionEvent e2) {

        }

    }

    public static void main(String[] args) {
        Test a = new Test();
        a.denglu();
    }

}

直接把这个对象定义为外部包装类的成员变量，就可以访问了

对的，是作用范围的问题，很明显，内部类是在外部包装类的里面，而外部包装类的成员变量，作用域是整个类内，当然也包括内部类了，所以在内部类中也可以访问外部包装类的成员变量